/*
 * JSF Toolkit Component Framework
 * Copyright (C) 2007 Noah Sloan <iamnoah A-T gmail D0T com>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 */
package com.jsftoolkit.utils;

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * {@link OutputStream} implementation that, like {@link FilterOutputStream},
 * delegates to another {@link OutputStream}, but retrieves the stream via an
 * abstract getter ({@link #getStream()}), allowing for more flexible
 * behavior.
 * <p>
 * In other words, the responsibility for storing the {@link OutputStream} is
 * delegated to subclasses.
 * 
 * @author noah
 * 
 */
public abstract class DelegatingOutputStream extends OutputStream {

	@Override
	public void write(int b) throws IOException {
		getStream().write(b);
	}

	@Override
	public void close() throws IOException {
		getStream().close();
	}

	@Override
	public void flush() throws IOException {
		getStream().flush();
	}

	@Override
	public void write(byte[] b, int off, int len) throws IOException {
		getStream().write(b, off, len);
	}

	@Override
	public void write(byte[] b) throws IOException {
		getStream().write(b);
	}

	protected abstract OutputStream getStream() throws IOException;

}
